東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Need-based feedback: An optimization...

University of Florida.

Linked to FindBook

Google Book

Amazon

博客來

Need-based feedback: An optimization approach.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Need-based feedback: An optimization approach./
Author:	Chakraborty, Debraj.
Description:	75 p.
Notes:	Adviser: Jacob Hammer.
Contained By:	Dissertation Abstracts International68-09B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3281510
ISBN:	9780549236467

Need-based feedback: An optimization approach.
Chakraborty, Debraj.

Need-based feedback: An optimization approach. - 75 p.

Adviser: Jacob Hammer.

Thesis (Ph.D.)--University of Florida, 2007.

Feedback is often used to overcome the adverse effects of perturbations and uncertainties on the performance of engineering systems. However, failures of the feedback channel cannot be completely avoided. This dissertation addresses the questions of how and for how long can desirable performance of a perturbed system be maintained after a failure of the feedback channel.

ISBN: 9780549236467Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Need-based feedback: An optimization approach.
LDR:02675nam 2200301 a 45 001 857514
005 20100712
008 100712s2007 ||||||||||||||||| ||eng d
020 $a 9780549236467
035 $a (UMI)AAI3281510
035 $a AAI3281510
040 $a UMI $c UMI
100 1 $a Chakraborty, Debraj. $3 1024465
245 1 0 $a Need-based feedback: An optimization approach.
300 $a 75 p.
500 $a Adviser: Jacob Hammer.
500 $a Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 6172.
502 $a Thesis (Ph.D.)--University of Florida, 2007.
520 $a Feedback is often used to overcome the adverse effects of perturbations and uncertainties on the performance of engineering systems. However, failures of the feedback channel cannot be completely avoided. This dissertation addresses the questions of how and for how long can desirable performance of a perturbed system be maintained after a failure of the feedback channel.
520 $a Let Sigmaepsilon be a system that is subject to a perturbation epsilon in its parameters. The exact value of the perturbation epsilon is not known; it is only known that epsilon is bounded by a given constant delta. Now, let u(t) be an input function of Sigma, and let Sigmaepsilonu be the response of the perturbed system to the signal u(t). The nominal system is Sigma0, and the nominal response to the signal u is Sigma 0u. Therefore, the deviation in the response caused by the perturbation is ||Sigmaepsilonu -- Sigma0u||. To reduce the perturbation, add a "correction signal" v(t) to the input signal, so that the perturbed response becomes Sigmaepsilon(u+v). Then, the new deviation between the perturbed and nominal cases becomes ||Sigmaepsilon(u+v) -- Sigma0u||. The correction signal v(t) must be independent of perturbation value epsilon, as the latter is not known.
520 $a Let M be the maximal deviation allowed for the response, and let t f be the time for which ||Sigmaepsilon(u+v) -- Sigma 0u|| ≤ M. Then, the objective is to find a correction signal v(t) that maximizes tf, given only that the perturbation is bounded by delta. Euler-Lagrange type first-order conditions for calculating the optimal correction signal v(t) is presented. It is shown that, under rather broad conditions, the optimal correction signal v(t) is either a bang-bang signal or can be arbitrarily closely approximated by a bang-bang signal.
590 $a School code: 0070.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Engineering, System Science. $3 1018128
690 $a 0544
690 $a 0790
710 2 $a University of Florida. $3 718949
773 0 $t Dissertation Abstracts International $g 68-09B.
790 $a 0070
790 1 0 $a Hammer, Jacob, $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3281510